After applying the wax I notice the surface is very smooth but under certain light I see streaks. What causes that?
There are 3 main reasons for streaks. Reason 2. is the most common cause. 1. The paint surface was hot and the wax “baked” in before proper spreading occurred. 2. If the streaks are more noticeable on the hood, trunk and roof rather than the doors and vertical surfaces, the paint has been oxidized. The sun attacks horizontal areas faster than vertical surfaces. Probably if you polished first, the polish was hard to buff off too. Dark paints like Black, Red and Blue can oxidize with just a few months exposure to sun. The pores of the damaged upper surface of paint open and suck in wax like a sponge. Proper application is not possible and streak patterns develop which actually follow the way you applied the wax! Remove all oxidation by polishing again and for a longer time than before. Then apply more wax to this area and check for streaks. Try this in one small streaked area first. Remember, if you were not getting streaks when the car was new and now that it’s been out in the sun for a
